Closable container



Aug. 9, 1938. O, K s o 2,126,116

CLOSABLE CONTAINER Filed Sept. 28, 1934 2 Shees-Sheet l a l r If .5 I f m n a I b g e 4 I m 4 P4 71 f Fig.1.,

Fig. 7

a r t a I I n u u v a v I I? I h \Z e 1 "4 1 4 "4 9' f V lnven/w' O fias f Aug. 9, 1938. o. KASDORF GLOSABLE CONTAINER Filed Sept. 28, 1954 2 Sheets-Sheet 2 lnmmfon' I 04 h ES ZorF Patented Aug-9,1938

PATENT OFFICE GLO SABLE CONTAINER Otto Kasdorl', Montevideo, Uruguay Application September 28, 1934, Serial No. 745,995 In Germany December 30, 1933 Claims.

This invention relates to containers of paper material, such as paper or cardboard of the kind in which the open end is closed by folding a rtion of the wall of the container-along pre- 5 formed[crease s.--J= vii *lltjhasr"alreadyfl been" proposed to make containers "of*"circular"or elliptical cross-section of paper or the like'glprefe'rablywaterproof material, and to close them by folding the upper end.

It is also known to provide such cylindrical or conical bottle-like containers with a four-cornered roof-shaped closing part formed by folds through previously made creases. Such a fourgeemeree folding has the disadvantage that the paper is"subjected to considerable strains and .stres's'esimom particularly at the corners, so that the'c'of ainer easily tears, more particularly at tho. ce'sliwhere the circular or elliptical crosserges n theb four-cornered cross-secfinerges into the folded closure hexagon, octagon or polygon which two opposite sides into two narrow infac'es which are inclined towards one wanother like'aroof and at the other sides into surfaces which fold 'togetherilikela concertina. In'the'foldingcl' 'ure-fonnedin this manner the curring t the places where one surrgesfinto the other are considerably is narrowen whi'ch provides the adth 91311181181"- closin'g-cl'amps can be used. her;- I which merge into the folded-in surfaces Furthermore, the bottle mouth formed advantage istha'ty those sides of the I r preventing"undesired fsudden bends and the strains caused thereby be formed with: folding creases which extend substantially alongthe curves formed where the folding surfaces merge container, the closing part of which is folded to form an octagon.

Fig. 2 shows the upper part of the container with the surfaces which are folded in a starlike inanner for preparing the closure and Fig. 3 shows this part folded together in concertina fashion.

Fig. 4 shows the completely folded closing part of the container with the closing member to be slipped on.

Figs. 5 and 6 show the completely closed container in perspective view and in vertical section. Fig. 7 shows the cut-out blank of another constru'ctional form of container and I Fig. 8 this container in perspective view.

The container is made substantially of a fourcornered sheet of paper or cardboard a, b, c, d, which is rolled up over a cylindrical mandrel or a mandrel in the shape of a truncated cone and the overlapping longitudinal edges of which are stuck together. The upper end of the container blank is divided up by the pressed-in creases i i to q q which are required for folding the closure part,'before or after rolling, into the areas I to 8, which with the exception of the area I and the overlapping areas 5, 5 are subdivided by further short longitudinal creases r to w. The areas I and 5 have no folding creases, as they 7 form the two flat surfaces of the-folding closure,

which lie oppositeone another like the'sides of a roof. On the other hand the areas 2 to 4 and 6 to 8 are additionally provided with oblique creases a: and 3 which enable these areas to be folded in in concertina fashion.

The completely. cylindrical container with a bottom part I0 which is inserted and fixed by an adhesive, according to Fig. 6, is closed after filling in such amanner that the areas 2 to 4 and 6 to 8 :of the closure part are folded in starlike fashion .andin concertina fashion by additionally pressingtogether the surfaces I and 5; On to the narrow end of the closure part, which is formed bysthe fiat surfaces I and 5 and the folding sura sheet-metal strip can be slipped. after a transverse fold has been made, which provides a secure and liquid-tight closure, the said clamp being 'suitably secured against displacement by longitudinally and transversely extending pressed-in grooves. The closure is secured in a particular- 1y simple manner by impressing an undulating roove.

The constructional example shown in Figs. 7 ands differs fromthat of Figs. 1 to 6 only in this that some of the areas, for instance the areas 2 to faces lying between them, a clamp 9 made of 4 and i to 8, are bounded at the bottom, not by straight creases but by arcuate creases, which correspond substantially to the curves formed where the folding surfaces andthe container wall merge into one another. When the closure part is folded these arcuate folding creases almost entirely prevent undesired straining and stressing of the paper which might result in the container becoming torn.

In the surfaces I and 5 or additionally in the body part of the container transparent windows II are formed or provided in a known manner,

which enable the contents of the container to be seen or make it possible to check whether the container has been completely filled.

If the container be made of ordinary paper it can be made liquid-proof after its manufacture by means of paraffin or other substances.

WhatI claim is:

1. A paper container of substantially circular cross-section comprising a body portion, a reduced closure portion adjoining the body portion and having a mouth therein, a folding crease circumscribing the container at the juncture of said scribing crease are determined by the intersection of the planes of said folds with said body portion.

3. A containeras claimed in claim 1 characterized in that the curvatures of the circumscribing crease are determined by the intersection of the planes of said folds with said body portion, the portions of said circumscribed crease located adjacent said flat portions being straight.

4. A paper container of substantially circular cross-section comprising a body portion, a reduced closure portion adjoining the body portion and having a mouth therein, said closure portion having opposed flat parts disposed in convergent relation and being of substantially less width than the diameter of the said body portion, the parts of said closure lying intermediate said fiat parts being creased and folded to form two groups of oppositely disposed folds extending in convergent relation, the extremities of said folds located at the mouth being disposed and held flatwise between said flat parts.

5. A paper container of substantially circular cross-section comprising a body portion, a reduced closure portion adjoining the body portion and having a mouth therein, said closure-portion having opposed flat parts disposed in convergent relation and being of substantially less width than the diameter of the said body portion, the parts of said closure lying intermediate said flat parts being creased and folded to form two groups of oppositely disposed folds extending in convergent relation, the folds of the two groups at said mouth having a combined depth substantially corresponding with the total width of and substantially filling the space between said flat parts.

O'I'IO KASDORF. 

